Method of acquiring information about contact persons from network based on check information

The invention provides a method of acquiring information about contact persons from a network based on check information. According to the method, a coded image is provided by contact person equipment at first; requester equipment acquires check information from the coded image; request information containing the check information is sent to network equipment; after receiving the request information, the network equipment carries out query in an information database in which a plurality of check information and a plurality of related personal information about contact persons respectively corresponding to the check information are stored, and sends related personal information about the contact person corresponding to the check information in the information database identical to the check information coming from user equipment to the requester equipment; therefore, there is no need for manual input of information about contact persons.